The New York Yankees have the most games by a team with 18+ runs in a season, with 5 games in 1939 and in 1931.

Interpreted as:

most 18 or more run games in a season by a team

	TEAM	G	R	SEASON	W%	W	L	AB	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Yankees	5	102	1939	1.000	5	0	232	103	15	3	22	97	38	3	11	4		278	190	40	5			3	.444	.527	.819	1.346
2	Yankees	5	97	1931	1.000	5	0	213	93	14	2	8	90	51	0	25	6		267	135	24	3				.437	.545	.634	1.179
3	Red Sox	4	90	1950	1.000	4	0	186	87	20	3	17	86	37	1	18	1		226	164	40	2			3	.468	.558	.882	1.440
4	Yankees	4	80	1936	1.000	4	0	171	80	11	6	16	80	35	2	12	1		208	151	33	0				.468	.563	.883	1.446
5	Cubs	4	77	1930	1.000	4	0	174	78	11	6	4	73	26	1	9	2		207	113	21	6				.448	.522	.649	1.172
6	Athletics	3	57	2024	1.000	3	0	126	54	8	2	19	57	17	4	14	0	1	149	123	29	0	2	0	1	.429	.503	.976	1.480
7	Diamondbacks	3	55	2019	1.000	3	0	135	57	8	1	14	54	22	6	32	0	0	164	109	23	0	1	0	1	.422	.518	.807	1.326
8	Orioles	3	55	2015	1.000	3	0	131	63	13	1	13	52	15	1	20	0	0	149	117	27	0	2	0	3	.481	.530	.893	1.423
9	Tigers	3	57	2008	1.000	3	0	123	49	8	1	6	52	24	2	18	1	0	153	77	15	2	2	0	0	.398	.497	.626	1.123
10	Dodgers	3	59	1943	1.000	3	0	132	66	14	2	3	57	23	1	6	3		158	93	19	2			2	.500	.577	.705	1.281
11	Red Sox	3	54	1939	1.000	3	0	128	51	15	0	6	51	22	1	15	0		153	84	21	2			1	.398	.490	.656	1.146
12	Tigers	3	57	1936	1.000	3	0	146	66	6	4	6	52	17	0	8	3		165	98	16	2				.452	.509	.671	1.180
13	White Sox	3	59	1936	1.000	3	0	135	62	18	1	1	55	32	4	4	0		175	85	20	4				.459	.573	.630	1.203
14	Tigers	3	54	1935	1.000	3	0	128	51	13	6	3	50	20	2	9	2		151	85	22	1				.398	.487	.664	1.151
15	Athletics	3	54	1932	1.000	3	0	165	68	13	3	7	52	25	2	17	1		195	108	23	3				.412	.495	.655	1.149
16	Yankees	3	57	1930	1.000	3	0	135	67	17	1	7	56	22	1	15	6		165	107	25	7				.496	.570	.793	1.362
17	Robins	3	60	1930	1.000	3	0	141	74	11	5	7	58	17	0	13	2		161	116	23	3				.525	.576	.823	1.399
18	Yankees	3	58	1927	1.000	3	0	133	63	13	5	10	57	20	3	10	2		161	116	28	5				.474	.551	.872	1.423
19	Pirates	3	63	1925	1.000	3	0	137	61	11	6	12	57	20	2	4	3		162	120	29	3				.445	.522	.876	1.398
20	Athletics	3	61	1912	1.000	3	0	130	65	9	11	0	55	19	1	13	14		157	96	20	7				.500	.567	.738	1.305
21	Giants	3	61	1912	1.000	3	0	122	62	19	3	3	55	19	0	9	16		145	96	25	4				.508	.574	.787	1.361
22	Orioles	2	40	2025	1.000	2	0	86	39	13	1	7	36	14	2	13	3	0	102	75	21	0	0	0	3	.453	.539	.872	1.411
23	Dodgers	2	37	2025	1.000	2	0	83	39	7	0	10	37	15	0	11	2	0	101	76	17	0	3	0	1	.470	.535	.916	1.450
24	Mets	2	38	2025	1.000	2	0	88	39	6	1	10	38	13	2	14	1	0	104	77	17	0	1	0	1	.443	.519	.875	1.394
25	Red Sox	2	37	2025	1.000	2	0	91	41	14	0	4	36	12	0	12	1	0	103	67	18	0	0	0	1	.451	.515	.736	1.251